Ikeuchi 【池内】6 The Japanese surnames etymology dictionary.
Gifu-ken , Aichi-ken . Heterogeneity of 伊佐治 . In Gifu-ken Kani-gun Mitake-chou Yamaguchi-ken Mine-shi Isaichi Isao called Isa surname in the Muromachi era Gifu-ken Kamo-gun Yaotsu-chou In the beginning of the Edo period in the early Edo period " It added that it added that it changed to Isasaki. 伊佐 reference.